How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
21.5” mid-2011 iMac wires? Finally trying to upgrade my RAM and these wires are blocking the slot — did get an iMac with poor build quality? What can I do? : r/mac
iMac Intel 21,5" Late 2011 (EDU) EMC 2496 - used original spareparts for Macs